predictive intelligence with google now complete. introducing droid dna by htc. it's not an upgrade to your phone. it's an upgrade to yourself. >>> police are investigating a crime, they can follow a trail of phone calls and e-mails, but texts certainly much harder to track down. but that could change if law enforcement agencies can persuade congress to act. there are new developments and brian todd is joining us now. what's going on here, brian? >> wolf, law enforcement now wants to be able to retrieve our text messages. not just the so-called meta data, the who and when, they want the context and carriers to store it for three months. as one prosecutor pointed out to us, these days your text is often where the evidence is. michelle says she started getting the harassing texts in early november. an anonymous person threatened to send nude pictures of her to her mother and then to a wide circulation. one text said i'm so close to sending them to everyone. you are so sexy, you'll be an online star in no time unless you answer me. the threats came from different ce